Combination lock system



FIG. 1 is a front perspective view of a combination lock system showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken lines indicate unclaimed portions and form no part of the claimed design. 

CLAIM The ornamental design for a combination lock system, as shown and described. 